A person is guilty of bail jumping in the first degree when by court order he has been released from custody or allowed to remain at liberty, either upon bail or upon his own recognizance, upon condition that he will subsequently appear personally in connection with an indictment pending against him which charges him with the commission of a class A or class B felony, and when he does not appear personally on the required date or voluntarily within thirty days thereafter.

Bail jumping in the first degree is a class D felony.